Coking-furnace.



L.IL. SUMMERS. ooKING PURNAGB.

APPLICATION FILED DEO. 18. 1909.

Patented May 9, 1911.

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L. L. SUMMERS. v

GOKING FURNACE.

APPLICATION FILED DEO.18, 1909.

Patented May 9, 1911.

2 SHEETS-SHEET 2.

.IN VEN TOR WITNESSES Ze/and 5km/77ers I A TTORNE V5 UNITED STATES PATENT OFFICE.

LELAND L. SUMMRS, OF CHICAGO, ILLINOIS, ASSIGNOR TO CONTINUOUS PROCESS COKE COMPANY, OF CHICAGO, ILLINOIS, A CORRORATION OF MAINE.

COKING-FURNACE.

Specication of Letters Patent.

Patented May 9, 1911.

Application led December 18 1909. Serial N 533,807

l REISSUED To all whom it may concern:

Be it known that I, LELAND L. SUMMERS, a citizen of the United States, residing at Chicago, in the count-y of Cook and State of Illinois, have invented certain new and useful Improvements in Coking-Furnaces, of which the following is a specifcation.\

The object of my invention is to provide improved coking ovens, and among other features of construction and operation, to provide means for heating the oven or retort from the top, causing the heat to be vertically transmitted to` the coal or other carbonaceous material contained in the closed retort, thereby securing coke of a compact formation. In order t0 accomplish this I construct `the top of the retort in the form of an arch, and in this particular design of oven, the hollow ducts from which the oven or retort derives its heat are made lengthwise of the oven, the gas burners, furnace, or other means of supplying heat to the ducts being situated atthe discharge end, and heated gases passing through the oven lengthwise and emerging at the charging end.

My invention further relates to means whereby the continuity of these ducts may be preserved, and yet the supporting arch be free to contract and expand under the action of the high temperature, without disturbing the continuity of the ducts and,

preserving the passage for the gases intact, and separate from the products of distillation which arise from the coal or carbonaceous material contained in the retort. By suspending or attaching the longitudinal ducts to segments of an overhead arch, it is possible to maintain a horizontal roof over the oven of uniform height throughout, and thus preserve a uniform depth to the material being coked and still provide means for permitting the supporting arch to contract and ex and. By giving the upper portion a su cient rise, permitting a vertical or transverse movement under the action of heat, and spacing the longitudinal ducts a slight distance apart, the ducts proper may expand'or contract freely, and at the same time the greater portion of the external area of the duct is exposed to a radiating action to the furnace, and thus for` The retort shown in the drawings is preferably of a continuous feeding type, 1n

lwhich coal is supplied to a hopper 8, and

by means of a suitable conveyer 11, operated by a plunger 9, the coal is moved through the oven and fed through the retort 1, beneath the longitudinal ducts 2, which are supplied with heat by the burners 3. The products of combustion from the burners'3, after passing through the ducts 2, emerge into the regenerators 6 and 7, which are supported by an independent arch 1 0 (Fig. 2) through the damper 4:, by means of which the products of combustion are alternately caused to pass through for regenerators 6 and 7. After emerging from the regenerator, the products of combustion pass to the flue 13. The carbonaceous material is forced through the retort'by means of the conveyer 11, operated by the ram 9,

`which causes the conveyer 11 to reciprocate backward and forward, and at each forward stroke to receive a charge of coal from the bin 8, and by the forward motion of this material to cause the coke as forined to be forced olf of the end of the conveyer at 12, -into the pit 14. The conveyer 11 is pro; vided with a downward projecting lug 15 `and upon the forward motion of the conveyer, the lug 15 forces the colte which is dropped from over the end 12 of the conveyer into the pit 14, to be forced outward into the space 16 and through the swinging gate 17, into the car or conveyer 18. The gases arising from the distillation of the carbonaceous material are preferably drawn from the retort through the opening 20 and pipe 21 (Fig.y 2) to condensers and washers where by-products may be recovered, and the gases are then supplied to the furnace 3 by meansof the burner 22. A suitable number of burners 22 may be used, one burner being provided for each duct, or a l single burner of adequate size being provided to a furnace and all ducts entering the ycommon furnace.

Longitudinal ducts 2` are a part of or are u A5 supported by the arch' segments 25. The

- Section, a firm support is given the ducts 2,

and as these ducts-are used simply for carrying the heated gases, a horizontal surface may be given the roof of the oven by either making each arch segment of irregular section, as shown in the cross section, Fig. 2, l or the ducts 2 mayi be suitably supported or n, vsuspended from the arch 10 (Fig. 3) by means of supports 30. By means of these constructions' the ducts which attain the hi hest `temperature in the ovens are the Ionly lparts in direct contact with the products of combustin from the furnace 3, and are permitted to expand freely. As no sup 'portmg stresses are imposed upon these ducts, the walls may be-made thm, and as the main supporting arch does not come inv vdirect Contact withthe products ofcombusy a tion, the arch 25 maybe made heavy and of materials capable of resistin the mechani- '35 cal strains. Where desired 1n the case of high temperature retorts, the ducts 2 may be made out of a very refractory 4material and may be attached b keying or suspending f from the arch 10 Fig. 3), which may be 40 made ofmaterial less refractory than the ducts 2, but having greater strength Ito resist the pressures imposed by the span of the arch. By this method of yconstructing 4 5 retort and a large radiating surface maintained from the ducts 2, and adequate rovision for expansion made without a ecting-Ithe mechanical stability of the structure.

'50 claim: Y A p 1. A cokingretort from which airis exl eluded, an -overhead arch, and heating ducts formeddn the arch and extending at right angles to the span of the arch.

2. In a coking retort, an arch locatedlover the retort, carrying heating ducts extending parallel to thelength of the retort. 3. In `a coking retort having an overhead arch hollow. ducts located in the arch formlocated over the furnace and extending lengthwise of the furnace, means for apply- 6a, ing heated gases to the ducts at theidischarge the ducts, widelspan's may be given to the aving` thusl described my invention, I arch member having an upper thrust section,

ing passages forv heated gases, said. passages end of the furnace and causing them to travel lengthwise of the furnace toward the chargingV end. l

5. In a coking retort having an overhead arch containing heating ducts, means for suspending the heating ducts from the arch, permitting the ducts to expand and contract independently of the'arch.

6. In a coking retort having an overhead arch carrying heating ducts, means '-of'at- 75 taching the heating ducts to the arch from one side and permitting radiation to the re- ,-tort from the other three sides. f

7. In a coking retort an overhead arch composed of ducts of irregular section for heating the reto-rt, said ducts extending lengthwise of the retort.

8. In a coking retort an overhead arch of refractory material having heating ducts arranged to form a horizontalroof to the retort. l v Y a .95 A coking retort having the top inclosed by horizontal heating ducts extending lengthwise of the retort.

10. A cokin retort having heating ducts ,90 forming a horizontal roof to the retort, `and means for supporting the heating ducts from an arch. l :1;

11. In 'a retort, a roofcompris'ing aplu rality of transverse arches, and iiue Vsections y depending from the members ofwhich said arches are compo-sed, said flue sections beingl provided with registering longitudinal Hue openings. a

' 12. In a retort, a roof comprisingaffplu- 100 rality of transverseA arches, and iue sections depending from the members of which said arches are composed, said flue sections bein spaced apart transversely and provided wit 105 registering longitudinal iue openings.

13. In a retort, a roof comprising'y a plurality of transverse arches, each arch mem vber comprising an upper thrust section contacting with the `adjacent members,l and a lower flue section integral with said` thrust sectionsaid Hue sections being spaced apart transversely and provided with registering longitudinal'iue openings..

14. In a retort havlng an arched roof, *an

and a loweriue section lntegral therewith, the sides of said Hue section -lyinglinside of l movement excepttoward the discharge end tion for thepurpose of leaving clearance spaces at the sides of the ue section when a plurality of said arch members are assem` bled. l l i 15. In aV retort, a roof comprising a plurality of transverse arches, ue sections depending from the members of which said 1,25 i

arches are composed, said Hue -sections being s'paced apa-rt transversely and provided with registering longitudinal uefopenings, means for conveyingmaterial through said `retort `.from end to end,- and a source of heat 130 communicating. with said ues at the disprojection extending downwardly from the 10 charge end of said retort. l discharge end of said floor into said pit.

16. In a retort, a longitudinallyrecipro- In testimony whereof, I have subscribed cable floor, means for supplying material my name. thereto at the charging end f said retort, LELND L SUMMERS means for restraining said material against movement except toward the discharge 'end Witnesses:

of said retort, a discharge pit beneath said IVALTER A. SCOTT, retort at'the discharge end thereof, and u CHARLES E. BURNAP. 

